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    <head>
        <meta charset="UTF-8">
        <link href="../assets/css/dashboard.css" rel="stylesheet" type="text/css">
        <title>图书借阅管理系统</title>
    </head>
    <body>
        <div class="moon"></div>
        <div class="mountain"></div>
        <div class="mountain two"></div>
        <div class="land"></div>
        <div class="house">
            <div class="roof1"></div>
            <div class="wall2">
                <div class="window2"></div>
                <div class="attic"></div>
            </div>
            <div class="wall1">
                <div class="window"></div>
            </div>
            <div class="roof2"></div>
        </div>
        <div class="snow-box">
            <div>
                <i class="snowflake" style="left: 11.39%; top: 25.00%;"></i>
                <i class="snowflake" style="left: 56.30%; top: 13.54%;"></i>
                <i class="snowflake" style="left: 78.43%; top: 66.48%;"></i>
                <i class="snowflake" style="left: 89.60%; top: 13.62%;"></i>
                <i class="snowflake" style="left: 48.19%; top: 55.04%;"></i>
                <i class="snowflake" style="left: 84.30%; top: 53.18%;"></i>
                <i class="snowflake" style="left: 72.50%; top: 59.57%;"></i>
                <i class="snowflake" style="left: 3.49%; top: 34.41%;"></i>
                <i class="snowflake" style="left: 8.36%; top: 9.45%;"></i>
                <i class="snowflake" style="left: 46.31%; top: 83.74%;"></i>
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                <i class="snowflake" style="left: 1.00%; top: 38.49%;"></i>
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            <div class="smaller">
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                <i class="snowflake" style="left: 84.04%; top: 43.66%;"></i>
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                <i class="snowflake" style="left: 67.46%; top: 24.18%;"></i>
            </div>
        </div>
         <div class="snow-box">
            <div>
                <i class="snowflake" style="left: 11.39%; top: 25.00%;"></i>
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            <div class="smaller">
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